Soil-packing roller



uly 3, 1968 KARL HEINZ SCHWAMBORN 3,393,616

SOIL-PACKING ROLLER Filed April 20, 1966 2 Sheets-Sheet 1 A. IA

INVENTOR ATTORNEYS Karl Heinz Schwomborn Mfim wvww 4 AV (b A W M) W 4 YAVALQ y 23, 1963 KARL HEINZ SCHWAMBORN 3,393,616

SOIL-PACKING ROLLER 2 Sheets-Sheet 2 Filed April 20, 1966 INVENTOR KarlHeinz Schwomborn BY MMUZITORNEYS United SKIES Patw of 3,393,616SOIL-PACKING ROLLER Karl Heinz Schwamborn, Boppard (Rhine), Germany,assignor to Bopparder Machinenbaugesellschaft m.b.H. BOMAG, Boppard(Rhine), Germany Filed Apr. 20, 1966, Ser. No. 544,003 Claims priority,application Germany, Apr. 21, 1965, B 81.546 7 Claims. (Cl. 94-50)ABSTRACT OF THE DISCLOSURE A soil-packing roller characterized in thatguide installations are provided on both longitudinal sides of theroller bodies to serve for guiding the roller along a surface which issubstantially perpendicular to the surface to be worked.

The invention concerns a roller for the packing down of soil throughwhich the soil material that has been put into ditches or otherdepressions can be compacted.

The known vibrating rollers have proved to be inadequate in that theycannot be used for the compacting of the loosely deposited fill innarrow ditches if for no other reason than because they are almostalways wider than the ditches. The selection of narrower bands or rollerbodies does not make it possible to operate the known rollers in a ditchsince rollers have protruding driving elements on both or on one sideand since they would knock against the wall of the ditch, which in mostcases is not smooth. Moreover, only a part of the ditch surface would becompacted by such a device. The guiding of this roller would be,moreover, more ditficult since an operator would be unable to move innarrow ditches and therefore would be unable to control the roller inthe customary manner. The plate vibrators, which are used now forcompacting, have, among others, the disadvantage that they have a smallcapacity for rising, and for that reason, they frequently become stuckin ditches because of the rather uneven fill.

The present invention is based on the idea of developing a soil-packingroller which can be readily used in narrow spaces and can be operatedfrom a remote position located higher than the roller, i.e., outside ofthe ditch, or can be controlled in the forward and reverse direction andwill govern itself at the same time along vertical walls.

For the solution of the above problems, the invention generallycomprises a soil-packing roller characterized in that, on both sides ofthe roller body, guide installations are provided which serve to guidethe roller along a surface which is approximately perpendicular to thesurface that is to be worked. The guiding installations can be developedas planks which, for example, can be manufactured from sectional steel.The guiding installations will preferably be longer than the length ofthe ditch roller in its direction of movement. It is also possible toprovide a number of rollers as a guiding means along both sides of theditch roller with the guide rollers lying in a straight line or in aslightly curved line. These guide rollers can be arranged by themselvesor in addition to the planklike elements, preferably by having therollers arranged on the ends thereof. In order to avoid the knockingagainst an obstacle, the ends of the guide planks converge at the frontend and at the rear end of the roller in relation to their middlelongitudinal plane.

Since the ditch roller, generally speaking, has a relatively smallwidth, a low position of the center of gravity is desirable. For thatreason the transmission system of 3,393,616 Patented July 23, 1968 lgethe invention has been arranged below the driving motor between theroller bodies.

In order to facilitate the remote operation of the ditch roller by theoperator from a point outside of the ditch, a so-called pneumaticsqueeze bulb is provided through which the driving is started or itsr.p.m. regulated, and if need be, even the travel direction of the ditchroller is changed. In order to keep the ditch roller as narrow aspossible, recesses are provided in the side elements of its frame inwhich the transmitting elements of the drive, for example, gears arehoused.

The means for accomplishing the foregoing objects and other advantages,which will be apparent to those skilled in the art, are set forth in thefollowing specification and claims and are illustrated in theaccompanying drawings dealing with a basic embodiment of the presentinvention. Reference is made now to the drawings in which:

FIGS. 1 and 2 show schematically a plan view of the inventive ditchroller positioned in a ditch;

FIG. 3 shows a side view of the inventive ditch roller; and

FIG. 4 shows a cross section through the ditch with an end view of theinventive ditch roller.

The ditch roller is generally noted by reference numeral 1. Guide planks2 are mounted on each side and are parallel to the direction of travelof the roller.

Instead of or in addition to the guide planks 2, rollers 9 can beprovided. The rollers 9 preferably protrude outward beyond the surfacesof the guide plank-s in the direction of the wall of the ditch. Therollers may be conveniently mounted on the guide planks 2. The mainroller bodies 3 and 4 are mounted in the frame 5. A driving motor 6,with auxiliary devices pertinent to it, is mounted above the framebetween the main rollers. The gearing means 7 is placed below thedriving motor 6 and between the main roller bodies 3 and 4 in order toobtain a center of gravity which is as low as possible.

In order to keep the width of the ditch roller as small as possible,recesses are provided in the lateral carriers of the frame (not shown inthe drawings), which serve for the housing of the transmission elementsof the drive means, namely, the gears. The pneumatic squeeze-bulb andhose attachment are shown generally and noted by reference number 8.

If need be, the frame of the inventive roller can be designed with thelateral parts similar to the guide planks 2 and serving as both theguiding devices and the gear housing. Rollers also may be provided withthe frame parts for guiding the roller in the same manner as with aplank-like manner.

The frame parts may be prolonged in both directions beyond the rollers 3and 4 with the ends inwardly turned so that the frame parts togetherwith their prolongations-viewed from abovewould be similar to theplank-like parts 2 shown in FIGS. 1 and 2.

The development of the frame parts as guiding devices is taken intoconsideration Whenever driving units are available, namely, the motorand gearing, which in their assembled condition, are no broader orhardly broader than the rollers 3 and 4.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiment is therefore to be considered in all respects as illustrativeand not restrictive, the scope of the invention being indicated by theappended claims rather than the foregoing description, and all changeswhich come within the meaning and range of equivalency of the claims aretherefore to be embraced therein.

What is claimed is:

1. A soil-packing roller in which conventional steering means isobviated comprising a frame, at least one :roller body mounted in saidframe, guide means mounted on said frame on both sides of said rollerbody, said guide means serving to guide the roller along a surface whichis substantially perpendicular to the surface to be worked, said guidemeans comprising plank-like guiding installations which are somewhatlonger than the measurements of said roller in its direction ofmovement, the ends of said guide means converging in the direction ofthe center of the roller with respect to their middle longitudinalplane, and a driving motor and transmission means mounted on said frameand operatively connected to drive said roller body.

2. A roller according to claim 1 in which a roller means is arrangedlaterally on said guide means and protrudes somewhat beyond the plane ofsaid guide means transversely to the direction of movement of theroller.

3. A roller according to claim 1 further comprising a remote controlmeans for controlling said driving motor and transmission means.

4. A roller according toclaim 1 in which recesses are provided inlateral frame parts of the roller, said transmission means being hou-sedin said recesses.

5. A roller according to claim 4 in which parts of the frame serve asboth said guide means and as said housing recesses.

6. A roller according to claim 1 in which there are at least two rollerbodies and said driving motor is disposed on said frame above andbetween said roller bodies.

7. A roller according to claim 6 in which said transmission means isarranged -below the driving motor and between the roller bodies.

References Cited UNITED STATES PATENTS 2,067,717 1/ 1937 Lawton et a1.6172.4 2,099,527 11/1937 Lawton 6172.4 2,587,343 2/1952 Lind 94-50 XR3,048,089 8/1962 Kaltenegger 9450 3,130,653 4/1964 Talbott 94--50 XRJACOB L. NACKENOFF, Primary Examiner.

